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/*
* compression.h
* Copyright 2008, Thorbjørn Lindeijer <thorbjorn@lindeijer.nl>
*
* This file is part of libtiled.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef COMPRESSION_H
#define COMPRESSION_H
#include "tiled_global.h"
class QByteArray;
namespace Tiled {
enum CompressionMethod {
Gzip,
Zlib
};
/**
* Decompresses either zlib or gzip compressed memory. Returns a null
* QByteArray if decompressing failed.
*
* Needed because qUncompress does not support gzip compressed data. Also,
* this method does not need the expected size to be prepended to the data,
* but it can be passed as optional parameter.
*
* @param data the compressed data
* @param expectedSize the expected size of the uncompressed data in bytes
* @return the uncompressed data, or a null QByteArray if decompressing failed
*/
QByteArray TILEDSHARED_EXPORT decompress(const QByteArray &data,
int expectedSize = 1024);
/**
* Compresses the give data in either gzip or zlib format. Returns a null
* QByteArray if compression failed.
*
* Needed because qCompress does not support gzip compression.
*
* @param data the uncompressed data
* @return the compressed data, or a null QByteArray if compression failed
*/
QByteArray TILEDSHARED_EXPORT compress(const QByteArray &data,
CompressionMethod method = Zlib);
} // namespace Tiled
#endif // COMPRESSION_H
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